This study uses data from TEDS-M to explore and compare possible individual-based and institutional-based predictors of future secondary mathematics teachers' readiness to teach in Taiwan, Germany, and the United States. Across the three countries, future teachers' intrinsic motivation to become teachers and the consistency of courses arrangement in the institutions where they studied were significant predictors of teaching readiness. Future teachers' highest grade level of mathematics studied at secondary school was a predictor of teaching readiness only in Taiwan, whereas the motivation derived from the empathy of prior learning experience was a predictor of teaching readiness in Germany and the United States, but not in Taiwan. [For the complete proceedings, see ED597799.]